SB 301 Oklahoma Senate · 2026 Regular Session

Income tax; modifying credit limit for certain institute in certain tax years. Effective date.

SB 301 modifies Oklahoma's tax credit system for donations to biomedical and cancer research institutes. It reduces annual credit limits to $1.5 million for biomedical research donations and $500,000 for cancer research donations starting in 2026, down from $2 million previously. Donors to qualifying institutes (which must receive $20 million annually in NIH funding for biomedical or $4 million for cancer research) will face new caps: $25,000 for business donors to biomedical institutes, and $1,000-$2,000 for individual filers depending on filing status. The bill adjusts how credit percentages are calculated using the second preceding year's claims and ensures credits cannot exceed tax liability.
Bill status signed all 5 stages cleared
Introduction
Feb 2025
Committee Review
Apr 2025
Senate Passage
Mar 2025
House Passage
Apr 2025
Signed into Law
May 2025
Introduced Feb 3, 2025 Signed May 12, 2025
Maddy AI version diff · 4 comparisons

What changed between versions

Floor (House) Floor (Senate) · 5 edits
MODERATE
The bill was converted from the House version to the Senate version, which reorganized the credit limits and formulas for tax donations to biomedical and cancer research institutes. The Senate version introduces specific annual credit caps based on tax year, separates limits for different types of donations, and adjusts the per-taxpayer credit amounts for business entities and individuals. These changes clarify how the total state credit pool is distributed and set new thresholds for when credits begin to be reduced.
Scope change
The scope of the bill remains focused on income tax credits for donations to research institutes, but the applicability of credit limits has been significantly modified with new annual caps and per-donor restrictions.
FISCAL

Credit limits were restructured with specific annual caps: $2M for 2007-2025, $1.5M for 2026+ for biomedical research, and $500K for 2026+ for cancer research institutes.

Per-taxpayer credit limits were increased for business entities to $25,000 for tax years 2026 and subsequent years.

ELIGIBILITY

Taxpayer credit limits were adjusted to $1,000 for single/separate filers and $2,000 for joint/head of household filers for tax years 2026 and beyond.

REQUIREMENT

New formulas were established to annually adjust credit percentages so total credits do not exceed the specified annual caps.

TIMELINE

Specific tax year thresholds were introduced, separating rules for 2007-2025 from 2026 and subsequent years.

Floor votes · Senate Mar 11, 2025 · House Apr 30, 2025

How they voted

450
Passed · 4 other
Total votes 49
Mar 11, 2025
D Democratic9
9 Yea
100% Yea
R Republican40
36 Yea 4
90% Yea
Vote distribution
All Yea All Nay Mixed No data
Full legislative history

Actions timeline

Total actions
24
Key actions
6
Committee
6
Apr 30, 2025
Committee
Referred for enrollment
upper
Apr 30, 2025
Lower · Passed
Third Reading, Measure passed: Ayes: 88 Nays: 0
lower
Apr 16, 2025
Lower · Passed
CR; Do Pass Appropriations and Budget Committee
lower
Apr 8, 2025
Lower · Passed
Recommendation to the full committee; Do Pass Appropriations and Budget General Government Subcommittee
lower
Apr 2, 2025
Committee
Referred to Appropriations and Budget General Government Subcommittee
lower
Mar 12, 2025
Introduced
First Reading
lower
Mar 12, 2025
Upper · Passed
Engrossed to House
upper
Mar 11, 2025
Committee
Referred for engrossment
upper
Mar 11, 2025
Upper · Passed
Measure passed: Ayes: 43 Nays: 0
upper
Feb 10, 2025
Upper · Passed
Reported Do Pass Revenue and Taxation committee; CR filed
upper
Feb 3, 2025
Introduced
First Reading
upper
2 primary · 0 co-sponsors

Sponsors